An Operating System commonly used before graphical user interfaces were introduced.
GUI
DOS
Windows
MacOS

What DOS command can be used to go into a directory?
dir
del
go
cd

In a file path, what represents the current directory?
.
..
dir
cd

In a file path, what represents the parent directory of the current directory?
.
..
dir
cd

http://jacobenfield.com/img/jakeweb_thumb.png is an example of
a relative path
an absolute path
